McQuay Skyline IM 777-1, Installation And Maintenance Manual

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6 McQuay IM 777-1
Installation Guidelines
3
Seal the double-wall panel on each side with an industrial/
commercial grade silicone sealant or duct seal compound.
It is extremely important to seal each panel hole or
penetration securely so it is airtight and watertight and
there is NO EXPOSED FOAM INSULATION.
Figure 11: Cutting and sealing injected-foam insulated panels
Field Mounting Junction Boxes and Other
Components
For field mounting 4" × 4" or smaller junction boxes to the
standard panel exterior, use a minimum quantity of 4, 3/16"
diameter pop rivets.
Do NOT use self-tapping drill screws.
They will not tighten nor secure properly and panel
damage can occur.
If larger, heavier components require mounting on unit panels,
use through-bolts with flat washers through both outer and
inner panels. To maintain panel integrity, seal both ends with
an industrial/commercial grade silicone sealant or duct seal
compound.
The unit frame channel is another excellent location for
securing heavier components; self-tapping screws are not
acceptable. Ensure that the location permits the full operation
of all access doors and panels and does not interfere with other
vital components.
Duct Connections
Use flexible connectors on the outlet and inlet duct connections
of all units. Do not position down flow fans over air ducts that
are routed down into the building. Use a discharge plenum
when bottom connections are necessary. See Figure 12
.
Figure 12: Discharge plenum
If the unit has a top mixing box or economizer damper or a top
duct connection, field fabricate and install flashing to divert
moisture from the connection. The flashing must lap over the
standing seams of the top panels. The flashing also must lap
over the side edges of the unit. See Figure 13
.
Figure 13: Flashing over top panels and sides of units
WARNING
Flame and smoke can cause equipment
damage, severe personal injury, or
death.
Before operating unit, seal all piping and
wiring holes on both inner and outer panels
with an industrial grade silicone sealant or
duct seal compound.
Do not use a cutting
torch or expose panel to fire . Panel
damage can occur.
WARNING
La fumée et les flammes peuvent
endommager le matériel et causesr des
blessures graves ou la mort.
Avant d’utiliser le dispositif, obturer tous les
trous de passage de tubulures et de fils
ménagés dans les panneaux intérieurs et
extérieurs au moyen d’une pâte à base de
silicone ou d’un mastic d’étanchéite â
conduits de qualité industrielle.
Ne pas se servir d’un chalumeau coupeur ni
exposer les pannequx à une flamme nue
pour ne pas risquer de les endommager.
Cut hole from both sides of panel
Seal completely with silicone
sealant or duct seal compound
Prop 65—Substances in fuel or from fuel combustion can cause personal injury or death,
and are known to the State of California to cause cancer, birth defects or other reproductive harm.
D i s c h a r g e
P l e n u m
F l a s h i n g
D u c t
F l a s h i n g
U n i t t o p
p a n e l
F l a s h i n g
D u c t
F l a s h i n g